Apparatus for covering parts of a textile drawing mechanism



E. ROGNER Oct. 21, 1958 APPARATUS FOR COVERING PARTS OF A TEXTILEDRAWING MECHANISM Filed March 10, 1953 3 Sheets-Sheet 1 m zwrap ERNST'RoGP/ER 6y: 7

E. ROGNER Oct. 21, 1958 APPARATUS FOR COVERING PARTS OF A TEXTILEDRAWING MECHANISM Filed March 10, 1953 3 Sheets-Sheet 2 Oct. 21, 1958 E.ROGNER 2,356,642

APPARATUS FOR COVERING PARTS OF, A TEXTILE DRAWING MECHANISM Filed March10. 1955 s Sheets-Sheet 3 unwrap.

E Rnsr Roe ER United States Patent APPARATUS FOR- COVERING PARTS or ATEXTILE DRAWING MECHANISM Ernst Rogner, Stuttgart-Bad Cannstatt,Germany, assignor to SKF Kugellagerfabriken Gesellschaft mitbeschraenkter Haftung, Schweinfurt, Germany, a limited liability companyThe present invention relates to textile drawing mechamsms.

It is frequently a difficult matter to feed rovings to the drawing planeof a drawing mechanism of a spinning machine without catching andtearing the roving on parts of the drawing mechanism, particularlyduring the times when the apparatus is being threaded and started up.Moreover, parts of the drawing mechanism are located well to the rear ofthe front of the machine and are fairly inaccessible so that it isdifficult to clean these parts.

' One of the objects of the present invention is to overcome thesedifficulties by providing a means for covering such parts of theapparatus so that they do not become dirty and so that a roving cannotbecome caught or torn thereon.

A further object of the present invention is to provide a cover of theabove type which is easy to mount and dismount on the machine.

Another object of the present invention is to provide a cover which doesnot require the conventional drawing mechanism structure to be alteredto accommodate the cover. 7 An additional object of the presentinvention is to provide a cover which will automatically remain in'engage ment with the drawing mechanism at all times.

With the above objects in view, the present invention mainly consists ofa drawing mechanism which includes a stationary support having a frontside and rear side and an elongated arm having a rear end pivotallyconnected to the support for movement about a horizontal axis and beingadapted to carry the toprolls of the drawing mechanism. Acover memberhas a pair of opposite side walls respectively facing opposite sides ofthe support i and arm and a rear wall interconnecting the side walls andfacing the rear side of the support and the arm, this cover member beingmounted on the support for free movement in a forward direction towardthe latter and said arm so as to remain in engagement with the supportand arm in all positions of the latter.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims.Theginvention itself, however, both as to its construction and itsmethod of operation, together with additional objects and advantagesthereof, will be best understood from the following description ofspecific embodiments when read in connection with .the accompanyingdrawings, in which:

Fig. 6 is a side elevational view of a different embodiment of a coverconstructed in accordance with the present invention; and

Fig. 7 is a fragmentary, partly diagrammatic, perspective view of thestructure of the invention illustrated in association with a rovingbeing guided to the drawing plane.

Referring now to the drawings, Fig. 1 shows the stationary support 12which is clamped to the rear stationary bar of the drawing mechanism bythe bolt 13, this rear bar not being shown in Figs. 1 and 2 and beingcarried by the stationary base of the apparatus on which the bottomrolls are mounted. A pin 14 is fixed to and extends through the support12 with opposite end portions of the pin 14 respectively extendingbeyond the opposite sides of the support 12. The arm 10, which carriesthe top rolls of the drawing mechanism, is pivotally mounted at its rearend on the pin 14 for movement about the horizontal axis of pin 14between the operative position shown in Fig. 1 and the inoperativeposition shown in Fig. 2. In the operative position of Fig. 1, the arm10 extends downwardly and forwardly in a direction parallel to thedrawing plane. The arm 10 is channel shaped and is provided withoutwardly pressed side portions which are respectively located at theopposite sides of support 12 and respectively formed with openingsthrough and beyond which the end portions of the pivot pin 14respectively extend. The arm 10 carries a catch member 11 whichcooperates in a known way with the portion 19 of the support 12 toreleasably hold the arm 10 in the operative position of Fig. l. v

Figs. 1 and 2 show the cover member 15 of the invention mounted on theapparatus, and the details of this cover member are further illustratedin Figs. 3-5 of the drawings. This cover member 15 includes a rear wall155 which is curved forwardly at the part 156 thereof. A pair ofparallel substantially triangular side walls 153' extend forwardly fromthe opposite rounded side edges 158 of the rear wall 155, and the covermember is formed with a pair of elongated aligned cutouts taking theform of slots 151 respectively passing through the side walls 153. Thetop edge 159 of the rear wall 155 is curved, as is best shown in Figs. 4and 5, and the opposite side walls 153 are each formed with a cutawayportion 150 (Fig. 3) located adjacent to the top edge 159 of the rearwall 155.

As is apparent from Fig. 1, the slots 151 extend forwardly anddownwardly so that the cover member 15 rests at the upper edges of theslots 151 on the pin 14 and is urged forwardly by its own weight. Thus,the top edge 159 engages the arm 10, and the bottom portion of the covermember 15 engages the support 12 at the part 160 thereof. As is apparentfrom Fig. 2, upon release of the Fig. 1 is a fragmentary side view ofthe rear portion of r catch means 11, 19 and upward turning movement ofthe arm 10 to the inoperative position shown in Fig. 2, the

arm 10 through its engagement with top edge 159 of cover 15 moves thelatter rearwardly along the opposite end portions of pin 14 to theposition shown where the cover member is still in engagement with thesupport 12 as well as the arm 10. Upon return of the latter to theoperative position of Fig. 1, the cover 15 will automatically move bygravity to the position of Fig. 1. During movement of cover 15 betweenthe positions of Figs. 1 and 2, the forwardly and downwardly inclinedupper edges of slots 151 slide along pin 14. It is also possible toprovide a resilient spring means of any type which is connected to thecover 15 for yieldably urging the latter to the position of Fig. 1. j

The cover member 15 is preferably made of a resilient sheet material,such as sheet metal, so that its opposite sides 153 may be yieldablymoved away from each other to pass over the opposite end portions of pin14 when the cover member is being mounted on and removed from themachine. However, this is not essential since a it is within the purviewof the present invention to provide a cover having the construction ofcover member 18 of Fig. .6 whichis identical-in all respects with thecover member 15 except .that instead of slots 15] the cover member 18 isprovided with cutouts in 'the forrn-of notches .181 whichmay bemovedonto the. opposite ends of pin .14 Without moving the opposite sidewalls of the cover member away from each other. Asa matter .:ofconvenience, however, the cover member 13 may also he made of aresilient sheet material,- if' desired.

The cover member 15 is shown in association with a roving 31 in Fig. 7which also shows the rear bar ".011 which the support 1.2 is .clampedbythe .bolt -13. The roving31 .is takeufrom a spool 130 locatedtothc "(carand to one side .of the support 1,2, arm it}, and cover member 15. Aneye 32 is mounted on stationary part of the apparatus'to guide theroving :51 to the drawing plane. When the roving is first threadedthrough "the apparatus and before the latter is started -.up,.the,roving3]. usually rests against the top part of the arm .10. Upon starting ofthe apparatus, the loose roving is pullcdgand moves rearwardly along thearm 10 and slips downwardly about the curved rear portion thereof andover the top curved edge 159 of the cover 153 to the position showninFig. 7 wherethe roving passes about one of the rounded side edgesv 158of rear wall 155 of the cover to the eye 32 and through the latter tothe drawing plane.

The top edge 159 prevents catching of theroving due to the curved shapeof this top edge, andthe rounded side edge 158 of the rear wall 155guides-the roving 31 with a minimum 'of friction. Thus, with theapparatus of the invention the roving 31 cannot tear or become caught onprojecting parts of the apparatus and more over is guided with a minimumof friction to'the drawing plane. During operation, the roving moves upand down along the rear wall 155 through a small portion of the lengththereof. The invention is of particular significance when used with anarrangement similar to that shown in Fig. 7 where t. e spool 30 islocated to'the rear and to one side of the support 12 and arm 110,because it is with just such an arrangement of parts that catching andtearingof the roving would most frequently occur if the apparatus werenot provided with a cover 15.

It will be understood that each of the elements de scribed above, or twoor more together, may also find a useful application mother types oftextile drawing mechanisms jdifiering from the types described above.

'Whilethe invention has been'illustrated and described. as embodied incover apparatus for textile drawing mechanisms, itzis not intended :tobe limited to the details shown, since various modifications andstructural changes may be made without departing inany way from thespirit of thezpresent invention.

Without;f-urther analysis, the foregoing will so fully reveal thegist-of the present invention that others can by applying currentknowledge readily adapt it for various applications without omittingfeatures that, from the standpoint of prior art, fairly constituteessential characteristicsof'the generic or specific aspects of thisinvention and, therefore, such adaptations should and are intended to becomprehended within-the -rneahing and range of equivalents of thefollowing claims.

What is claimed as new and desiredtobe secured by Letters Patent is:

1. In atextile drawing mechanism, in combination, a stationary supporthaving a 'front side and a rear side: an elongated armhaving a read endpiovotally connected to said supo-rt for movement about a horizontalaxisand being adapted to carry the top rolls of the drawing mechanism;and a cover member having a pair of opposite side walls respectivelyfacing opposite sides of said sup- 7 port and arm and having arear wallinterconnecting'said side walls and facing said rear side of saidsupport and said rear end of said arm, said cover member being mountedon said support for free movement in a forward direction toward thelatter and said arm so as to remain in engagement with said support andarm in all positions of the latter.

2. In a textile drawing mechanism as recited in claim 1, saidrearwallhaving a top curved edge and said side walls respectively beingformed with cutaway portions respectively locatedmext to the ends ofsaid top curved edge of said-rear-wall.

3. In a textile drawing mechanism, in combination, a stationary supporthaving a front side and a rear side; an elongated armlhaving a rear endpivotallyconnected to said support for movement about a horizontal axisand being adaptedto carry the toprolls of the drawing mechanism; and acover member having a pair of opposite side wallsrespectiv'ely facingopposite sides of said support and (arm and having a rear wallinterconnecting said side walls and 'facing said rear side ofsaidsupport and said rear end of said arm, said cover memher being mountedon said support for free-movement under'the influence of gravity in aforward direction toward the latter and said arm so as to remaininengagement with said support and arm in all positions of the latter.

In a textiledrawing mechanism, in combination, a stationarysupport'havin'g .a front side and a rear side; an elongated arm having arear end pivotally connected to said support 'for movement aboutahorizo'ntal axis and being adapted .to carry the top rolls of thedrawing mechanism; a pin member mounted on said supportan'd havingopposite end portions respectively extending beyond opposite sides ofsaid support; and a cover memher having a. pair of opposite side wallsformed with elongated cut outs, respectively, through which said, endportions ,of said pin member respectively extend and havinga rear wallfacing said rear 'side of said support and said rear endof said arm andinterconnecting said side walls, said cover member resting on said endportions of said pin member for free movement in a forward directiontoward said support and arm so as to engage said support and arm in allpositions of the latter.

5. In a textile drawing mechanism, in combination, a stationarysupporthavinga frontside and a rearside; an elongated arm having ,afrearend ,pivotally connected to said supportlfor movement about .ahorizontal axis and being adapted tbfcarry. the. top rolls vo'fthedrawing mechanism; a 'pin member mounted on said support and havingoppositeeend por'tions respectively extending beyondopposite..sides.ofsaid support; and a cover member havinga rearwalLfacingfsaid rearside of said support and said rear end of. said arm.andhaving a pair of opposite side walls respectively extendingforwardlyfrom opposite side edges ofsaid rear wall and respectively being formedwith forwardly extending and downwardly inclined cutouts through whichsaid end portions of said pin respectively extend, ,said cutoutsrespectively having forwardly and downwardly inclined upper edges sothat said :cover member rests-at said upper edges of said cutouts onsaid end portions of said pin, respectively, and is thereby constantlyurged forwardly by its own weightso as to remain constantly inengagement with said support and arm in all positions of the latter.

6. In a textile drawing mechanism, in combination, a stationary supporthaving'a front side and a rear side; an;elongated arm having a rearendpivotally connected to said support for movement about a horizontalaxis and being adapted to carry the top rolls of the drawingmechanism;'a pin-member, mounted on, said support and having oppositeend portions respectively extending beyond opposite sides of saidsupport; and a cover member having a rear wallfacing'said rear side ofsaid support and ;said:rear:end of, said'arm'and having a pairofopposite side walls respectively extending forwardly'from opposite.side edges of 'said rear wall and respectively 'be'ing formed withforwardly extending and downwardly inclined slots through which said endportions of said pin respectively extend, said slots respectively havingforwardly and downwardly inclined upper edges so that said cover memberrests at said upper edges of said slots on said end portions of saidpin, respectively, and is thereby constantly urged forwardly by its ownweight so as to remain constantly in engagement with said support andarm in all positions of the latter, said cover member being made of aresilient sheet material so that it may be snapped onto and off fromsaid end portions of said pin.

7. In a textile drawing mechanism, in combination, a stationary supporthaving a front side and a rear side; a pin member fixed to said supportand having opposite end portions respectively extending beyond oppositeside faces of said support; an elongated arm having a rear end portionpivotally carried by said pin and located inwardly of said end portionsthereof, said arm being adapted to carry the top rolls of the drawingmechanism; and a cover member having a rear wall facing said rear sideof said support arm said rear end of said arm and having a pair ofopposite side walls respectively extending forwardly from opposite sideedges of said rear wall and respectively being formed with forwardlyextending and downwardly inclined cutouts through which said endportions of said pin respectively extend, said cutouts respectivelyhaving forwardly and downwardly inclined upper edges so that said covermember rests at said upper edges of said cutouts on said end portions ofsaid pin, respectively, and is thereby constantly urged forwardly by itsown weight so as to remain constantly in engagement with said supportand arm in all positions of the latter.

8. In a textile drawing mechanism, in combination, a stationary supporthaving a front side and a rear side; an elongated arm having a rear endpivotally connected to said support for movement about a horizontal axisand being adapted to carry the top rolls of the drawing mechanism; a pinmember mounted on said support and having opposite end portionsrespectively extending beyond opposite sides of said support; and acover member having a rear wall facing said rear side of said supportand said rear end of said arm and having a pair of opposite side wallsrespectively extending forwardly from opposite side edges of said rearwall and respectively being formed with forwardly extending anddownwardly inclined cutouts through which said end portions of said pinrespectively extend, said cutouts respectively having forwardly anddownwardly inclined upper edges so that said cover member rests at saidupper edges of said cutouts on said end portions of said pin,respectively, and is thereby constantly urged forwardly by its ownweight so as to remain constantly in engagement with said support andarm in all positions of the latter, and said rear wall of said covermember having a top curved edge engaging said arm.

9. In a textile drawing mechanism, in combination, a stationary supporthaving a front side and a rear side; an

elongated arm having a rear end pivotally connected to said support formovement about a horizontal axis and being adapted to carry the toprolls of the drawing mechanism; a pin member mounted on said support andhaving opposite end portions respectively extending beyond oppositesides of said support; and a cover member having a rear wall facing saidrear side of said support and said rear end of said arm and having apair of opposite side walls respectively extending forwardly fromopposite side edges of said rear wall and respectively being formed withforwardly extending and downwardly inclined cutouts through which saidend portions of said pin respectively extend, said cutouts respectivelyhaving forwardly and downwardly inclined upper edges so that said covermember rests at said upper edges of said cutouts on said end portions ofsaid pin, respectively, and is thereby constantly urged forwardly by itsown weight so as to remain constantly in engagement with said supportand arm in all positions of the latter, and said opposite side edges ofsaid rear wall being smoothly rounded so as to guide a roving to thedrawing plane with a minimum of friction.

10. In a textile drawing mechanism, in combination, a stationary supporthaving a front side and a rear side; an elongated arm having a rear endpivotally connected to said support for movement about a horizontal axisand being adapted to carry the top rolls of the drawing mechanism; a pinmember mounted on said support and having opposite end portionsrespectively extending beyond opposite sides of said support; and a.cover member having a rear wall facing said rear side of said supportand said rear end of said arm and having a pair of opposite side wallsrespectively extending forwardly from opposite side edges of said rearwall and respectively being formed with forwardly extending anddownwardly inclined cutouts through which said end portions of said pinrespectively extend, said cutouts respectively having forwardly anddownwardly inclined upper edges so that said cover member rests at saidupper edges of said cutouts on said end portions of said pin,respectively, and is thereby constantly urged forwardly by its ownweight so as to remain constantly in engagement with said sup port andarm in all positions of the latter, and said rear wall of said covermember having a top curved edge engaging said arm, and said oppositeside edges of said rear wall being smoothly rounded so as to guide aroving to the drawing plane with a minimum of friction.

References Cited in the file of this patent UbriTED STATES PATENTS1,149,209 Nelson Aug. 10, 1915 1,597,092 McTighe Aug. 24, 1926 2,075,484Truslow Mar. 30, 1937 2,148,367 Ditmore Feb. 21, 1939 2,225,722 SpiethDec. 24, 1940 2,601,705 Stahlecker July 1, 1952 2,657,434 Tarbox et a1Nov. 3, 1953 UNITED SIATES PATENT UFFICE CERTIFICAKEE 0F @URRJECTIUNPatent No, 2,856,642 October 2.1; M58

Hog- 16.21 9 It is hereby certified 'Ehat erzmr appears in the printedspeeification of the above numbered patent requiring corrsction and thatthe said Letters Patent should read as corrected below Column 3 lin s69, for "m-zad" mad u Signed and sealeci this 6th d ay of Januaryittest:

KAPL a AJKLINJ ROBERT C. WATSON Attesting Ofiicer Commissioner ofPatents

